Live analysis

20,001

20,001 is a composite number, odd.

This number doesn't have a permanent NumberWiki page yet — what you see below is computed live. Pages get added to the permanent index when they're notable (years, primes, curated, etc.).

20,001 (twenty thousand one) is an odd 5-digit number. It is a composite number with 8 divisors, and factors as 3 × 59 × 113. Written other ways, in hexadecimal, 0x4E21.

Arithmetic Number Cube-Free Deficient Number Evil Number Harshad / Niven Sphenic Number Squarefree

Interestingness

★ ★ ★ ☆ ☆

5 notable facts · grade C

19,989 19,990 19,991 19,992 19,993 19,994 19,995 19,996 19,997 19,998 19,999 20,000 20,001 20,002 20,003 20,004 20,005 20,006 20,007 20,008 20,009 20,010 20,011 20,012 20,013

less more

Properties

Parity: Odd
Digit count: 5
Digit sum: 3
Digit product: 0
Digital root: 3
Palindrome: No
Bit width: 15 bits
Reversed: 10,002
Square (n²): 400,040,001
Cube (n³): 8,001,200,060,001
Divisor count: 8
σ(n) — sum of divisors: 27,360
φ(n) — Euler's totient: 12,992
Sum of prime factors: 175

Primality

Prime factorization: 3 × 59 × 113

Nearest primes: 19,997 (−4) · 20,011 (+10)

Divisors & multiples

All divisors (8)

1 · 3 · 59 · 113 · 177 · 339 · 6667 · 20001

Aliquot sum (sum of proper divisors): 7,359

Factor pairs (a × b = 20,001)

1 × 20001

3 × 6667

59 × 339

113 × 177

First multiples

20,001 · 40,002 (double) · 60,003 · 80,004 · 100,005 · 120,006 · 140,007 · 160,008 · 180,009 · 200,010

Sums & aliquot sequence

As consecutive integers: 10,000 + 10,001 6,666 + 6,667 + 6,668 3,331 + 3,332 + 3,333 + 3,334 + 3,335 + 3,336 310 + 311 + … + 368

Aliquot sequence: 20,001 → 7,359 → 3,393 → 2,067 → 957 → 483 → 285 → 195 → 141 → 51 → 21 → 11 → 1 → 0 — terminates at zero

Continued fraction of √n

√20,001 = [141; (2, 2, 1, 4, 1, 4, 1, 18, 35, 3, 3, 2, 1, 10, 1, 1, 1, 1, 1, 1, 3, 17, 2, 2, …)]

Representations

In words: twenty thousand one
Ordinal: 20001st
Binary: 100111000100001
Octal: 47041
Hexadecimal: 0x4E21
Base64: TiE=
One's complement: 45,534 (16-bit)
Scientific notation: 2.0001 × 10⁴
As a duration: 20,001 s = 5 hours, 33 minutes, 21 seconds

In other bases

ternary (3) 1000102210

quaternary (4) 10320201

quinary (5) 1120001

senary (6) 232333

septenary (7) 112212

nonary (9) 30383

undecimal (11) 14033

duodecimal (12) b6a9

tridecimal (13) 9147

tetradecimal (14) 7409

pentadecimal (15) 5dd6

As an angle

20,001° = 55 × 360° + 201°

201° ≈ 3.508 rad

Compass bearing: SSW (south-southwest)

Why does a circle have 360 degrees? →

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒁹
Egyptian hieroglyphic: 𓂍𓂍𓏺
Greek (Milesian): ͵καʹ
Mayan (base 20): 𝋢·𝋪·𝋠·𝋡
Chinese: 二萬零一
Chinese (financial): 貳萬零壹

In other modern scripts

Eastern Arabic ٢٠٠٠١ Devanagari २०००१ Bengali ২০০০১ Tamil ௨௦௦௦௧ Thai ๒๐๐๐๑ Tibetan ༢༠༠༠༡ Khmer ២០០០១ Lao ໒໐໐໐໑ Burmese ၂၀၀၀၁

Digit at this position in famous constants

π — Pi (π): Digit 20,001 = 8
e — Euler's number (e): Digit 20,001 = 6
φ — Golden ratio (φ): Digit 20,001 = 6
√2 — Pythagoras's (√2): Digit 20,001 = 3
ln 2 — Natural log of 2: Digit 20,001 = 5
γ — Euler-Mascheroni (γ): Digit 20,001 = 2

Also seen as

Unicode codepoint

両

CJK Unified Ideograph-4E21

U+4E21

Other letter (Lo)

UTF-8 encoding: E4 B8 A1 (3 bytes).

Lookup U+4E21 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#004E21

RGB(0, 78, 33)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.78.33.

Address: 0.0.78.33
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.78.33

Unspecified address (0.0.0.0/8) — "this network" placeholder.

Position in π

The digit sequence 20001 first appears in π at position 54,199 of the decimal expansion (the 54,199ordinal-suffix:th digit after the integer 3).

Search range: the first 1,000,000 fractional digits of π. Any 6-digit-or-shorter string is virtually guaranteed to appear in there — the more interesting signal is the position.

Look up 20001 on Pi Search ↗